Stephen Thomas Erlewine from AllMusic noted the "slamming cacophony" of the song, "where hip-hop meets hardcore techno, complete with a Schoolly D sample and an elastic bass riff."

He added, "Everything is going on at once in "Block Rockin' Beats", and it sets the pace for the rest of the record, where songs and styles blur into a continuous kaleidoscope of sound.

"[8] Larry Flick from Billboard described it as a "genre-spanning revelation", and stated that "after one spin, you'll be chanting the hook for hours, and the blend of scratchy funk beats and acidic keyboards are sure to get the body moving.

"[9] The Daily Vault's Sean McCarthy commented, "Beginning with a funky bass beat, the music explodes with a blast of sonic fury.

[13] British magazine Music Week gave it four out of five, adding that "this chunky techno/hip hop sound clash finds the Chemicals at their most in-your-face".

[15] A reviewer from People Magazine said that on the "cacophonous, turbo-charged" track, the duo "borrow heavily from hip hop’s cut-and-paste production methods".

[16] David Fricke from Rolling Stone named "Block Rockin' Beats" the "Whole Lotta Love" of Dance Floor '97.

"[18] Sunday Mirror commented, "The dance kings follow up the Noel Gallagher flavoured No 1 "Setting Sun" with an even noisier mess of thumping drums and wailing guitars.

A writer remarked that "there was something about the combined fury of that Schoolly D vocal sample, that hypnotic bassline and those big drums that turned this one into an anthem for the breakbeat set.