Frame type steel structure building connecting piece

The utility model discloses a frame type steel structure building connecting piece which comprises a vertical beam, a cross beam, a connecting sleeve and an inner sliding block, a first prefabricated hole is formed in the vertical beam, the left end of the connecting sleeve is of a closed structure and is provided with a second prefabricated hole, and the right end of the connecting sleeve is of an open structure and is fixedly provided with extension plates arranged on the upper layer and the lower layer. The inner sliding block is matched with an inner cavity of the connecting sleeve and can linearly slide in the connecting sleeve, a clamping groove matched with the cross beam is formed in the right end of the inner sliding block, the cross beam can linearly slide in the clamping groove, third prefabricated holes are formed in the extension plates, and fourth prefabricated holes corresponding to the third prefabricated holes are formed in the inner sliding block. And fifth prefabricated holes corresponding