[1][2] Klaštorny was born in the village of Parečča (now in Lepiel district of Viciebsk region) into a farming family.

He studied at a school for adult workers in Vorša and, later, at the Belarusian State University (the literary and linguistic department of the pedagogical faculty).

[1] Apart from numerous poems in subsequent years, Klaštorny authored short stories and  essays and translated into Belarusian works of K. Vanek, F. Panfiorov, V. Gusev, P. Tychyna, V. Mayakovsky and others.

In one of his last books (the fairy tale About the Hare, the Wolf and the Bear, 1934), he depicted a Belarusian intellectual in the image of a hare living in an atmosphere of total violence and fear between a wolf and a bear (a metaphor for the Stalinist penal system).

[1] One of Klaštorny's daughters, a gulag survivor Maia Klaštornaja, was a research manager of the Kurapaty memorial in Minsk.