The invention discloses a pipe clamp and belongs to the field of architectural decoration and finishing. The pipe clamp comprises a pipe accommodating clamp rack, a cement nail, a support stand columnand a compressing platform, wherein an arc-shaped wall and a straight wall are arranged on the internal connecting surface of the pipe accommodating clamp rack; the arc-shaped wall is a semi-circularsupport internal connecting surface, and the diameter of the semi-circular support internal connecting surface is matched with a fire-retardant pipe; the straight wall is a section of internal connecting surface, and the surface of the internal connecting surface extends in the tangential direction of the arc-shaped wall; a fastening head is arranged at the tip of the straight wall; an inner holefor accommodating the cement nail is formed in the support stand column, and the diameter of the inner hole is matched with the cement nail; The included angle of the chord surface of the arc-shapedwall the plane of the compressing platform is 45 degrees; and the pipe accommodating clamp rack, the support stand column and the compressing platform are of integrated structure. The pipe clamp can reduce the reversible deformation pressure when the fire-retardant pipe is away from the wall, and the pipe clamp is prevented from rotating along the surface of the fire-retardant pipe when knocking installation is carried out. The pipe clamp is suitable for installation of various electrotechnical fire-retardant pipes.