High-pressure cleaning device with gun head convenient to replace

The high-pressure cleaning device comprises a connecting pipe, a circular groove is formed in the upper portion of the connecting pipe, a sealing mechanism is arranged in the circular groove, a connecting disc is arranged on the upper portion of the connecting pipe, and inserting grooves are formed in the left side and the right side of the upper portion of the connecting disc. A plurality of arc-shaped grooves are formed in the inner side of the connecting disc, the inserting grooves communicate with the arc-shaped grooves, connecting blocks are arranged in the arc-shaped grooves, cavities are formed in the connecting blocks, fixing mechanisms are arranged in the cavities, a gun head body is arranged between the two connecting blocks, and the sealing mechanism comprises a plurality of first springs and a sealing ring. The multiple first springs are all installed in the circular groove, and the sealing ring is installed at the top ends of the multiple first springs. When the gun head is used, the gun head bod