The invention discloses a portable water pipe clamp. The portable water pipe clamp comprises a clamp body composed of a semicircular cover and vertical plates fixed to the two sides of the semicircular cover. Each vertical plate is provided with a bolt hole, and the inner wall of the semicircular cover is provided with two annular semicircular grooves, wherein the section of each semicircular groove is in a T shape. The clamp body further comprises semicircular blocks composed of semicircular transverse blocks and semicircular vertical blocks fixed to the side edges of the semicircular transverse blocks, wherein the section of the semicircular blocks is in a T shape. The semicircular grooves are internally in sliding connection with the multiple semicircular blocks matched with the semicircular grooves, and the lengths of the sections of the semicircular transverse blocks of the semicircular blocks are different.