Splicing type prefabricated part

The utility model discloses a splicing type prefabricated part which comprises a prefabricated plate, a splicing lock and four joint sleeve blocks, the number of the joint sleeve blocks is four, the joint sleeve blocks are respectively arranged at four corners of the prefabricated plate, and the prefabricated plate comprises an external mounting plate, a polyester foam layer, a foam concrete base layer and a flame-retardant foam plate which are sequentially pasted and fixed. A sleeve hole is formed in the surface of the joint sleeve block, the splicing lock comprises a supporting base, a lock rod and lock heads fixedly installed at the two ends of the lock rod, and shaft sleeve bases rotationally connected to the outer side of the lock rod in a sleeving mode are fixedly installed on the two sides of the supporting base. According to the assembly type building, the structure of the prefabricated plate and the splicing lock which are independent of each other is arranged, the joint sleeve block on the surface o