The invention belongs to the field of side slope and 
bank slope protection 
engineering, and discloses an anti-seepage and anti-freezing 
protection system for 
bank and side slopes of a reservoir in a cold region. The anti-seepage and anti-freezing 
protection system comprises a foundation embedded in the side slope. A gravel 
cushion layer, a composite anti-drainage plate and a Renault protection padare sequentially laid from inside to outside on the slope surface of the side slope from the foundation to a set height of the side slope, wherein the set height of the side slope is higher than a surge 
water level. The anti-seepage and anti-freezing 
protection system further comprises one-way drainage pipes, wherein the one-way drainage pipes comprise a bottom one-way drainage 
pipe and a top one-way drainage 
pipe. The water inlet section of the bottom one-way drainage 
pipe penetrates through the foundation and extends into the side slope. The water inlet section of the top one-way drainage pipe penetrates through the Renault protection pad, the composite anti-drainage plate and the gravel 
cushion layer sequentially and extends into the side slope. The invention further discloses a construction method of the anti-seepage and anti-freezing protection 
system for the 
bank and side slopes of the reservoir in the cold region. The anti-seepage and anti-freezing protection 
system is simple in structure, reliable in function, convenient to construct, long in service life, and capable of effectively preventing 
erosion damage and seepage damage to the bank and side slopes of the reservoir,greatly weakening freezing and thawing damage to the side slope, and ensuring long-term stability of the bank and side slopes of the reservoir.