Assembled prefabricated roof drain

The utility model relates to the technical field of municipal engineering, in particular to a split mounting type prefabricated roof drain which comprises a bottom support and an upper structure, a bottom support groove matched with the bottom support is formed in the bottom of the side face of the upper structure, a first semicircular groove used for embedding a rainwater connecting pipe is downwards formed in the top of the bottom support, and a corresponding second semicircular groove is upwards formed in the bottom support groove. The problems that in the prior art, time and labor are wasted when the prefabricated roof drain is aligned and sleeved into a rainwater connecting pipe, the connector position is often damaged in the installation process, and gaps are generated are solved. 本实用新型涉及市政工程技术领域，具体是一种拼装式的预制雨水斗，包括底托和上部结构，上部结构的侧面底部设有与底托相吻合的底托槽，底托顶部向下开设用于嵌入雨水连接管的半圆形槽一，所述底托槽向上开设对应的半圆形槽二。本实用新型解决了现有技术中将预制雨水斗对齐、套入雨水连接管费时费力，且在安装过程中往往会破坏接口位置，产生缝隙的问题。